Here the plants are listed according to the month the photo was taken within the year, which often but not always corresponds to the time of flower.
Non-blooming plants as e.g. ferns and mooses, and other organisms as lichens or algae can't be selected here.
Note that the blooming time of the same plant can differ by more than two months, depending on its location: near the sea or in the mountains, sunny or shadowy.
Moreover there are plants which are blooming many months of the year, for which an extreme example is the Common Field Speedwell, which is in flower during almost the whole year.